Until it turns out that the NSA was involved writing said RNG and explicitly weekend it with a backdoor...
Also, somewhere in the thread, they mention that it is probably too hard to verify how it is actually implemented in the hardware.
https://www.reddit.com/r/crypto/comments/klcx4p/is_true_rand...
I guess in security only the paranoid prevails...
Or it is indeed just a cool gimmick...